import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet("/login")
public class loginServlet extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String name=req.getParameter("username");
        String password=req.getParameter("password");
        if(name == null || password== null ||name.equals("")||password.equals(""))
        {
            resp.setContentType("text/html;charset=utf8");
            resp.getWriter().write("请求参数不完整");
            return;
        }

         if(!name.equals("张三")){
             resp.setContentType("text/html;charset=utf8");
             resp.getWriter().write("用户名错误");
             return;
         }

        if(!password.equals("123456")){
            resp.setContentType("text/html;charset=utf8");
            resp.getWriter().write("密码错误");
            return;
        }


        HttpSession session=req.getSession(true);
        session.setAttribute("username",name);
        session.setAttribute("time",System.currentTimeMillis());

        resp.sendRedirect("index");
    }
}





















